Commit | Line | Data |
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7336d0e6 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
b3b94faa DT |
2 | /* |
3 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
da6dd40d | 4 | * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved. |
b3b94faa DT |
5 | */ |
6 | ||
7 | #include <linux/sched.h> | |
8 | #include <linux/slab.h> | |
9 | #include <linux/spinlock.h> | |
10 | #include <linux/completion.h> | |
11 | #include <linux/buffer_head.h> | |
5c676f6d | 12 | #include <linux/gfs2_ondisk.h> |
71b86f56 | 13 | #include <linux/crc32.h> |
c1696fb8 | 14 | #include <linux/crc32c.h> |
a25311c8 | 15 | #include <linux/delay.h> |
ec69b188 SW |
16 | #include <linux/kthread.h> |
17 | #include <linux/freezer.h> | |
254db57f | 18 | #include <linux/bio.h> |
885bceca | 19 | #include <linux/blkdev.h> |
4667a0ec | 20 | #include <linux/writeback.h> |
4a36d08d | 21 | #include <linux/list_sort.h> |
b3b94faa DT |
22 | |
23 | #include "gfs2.h" | |
5c676f6d | 24 | #include "incore.h" |
b3b94faa DT |
25 | #include "bmap.h" |
26 | #include "glock.h" | |
27 | #include "log.h" | |
28 | #include "lops.h" | |
29 | #include "meta_io.h" | |
5c676f6d | 30 | #include "util.h" |
71b86f56 | 31 | #include "dir.h" |
63997775 | 32 | #include "trace_gfs2.h" |
b839dada | 33 | #include "trans.h" |
b3b94faa | 34 | |
feed98a8 BP |
35 | static void gfs2_log_shutdown(struct gfs2_sbd *sdp); |
36 | ||
b3b94faa DT |
37 | /** |
38 | * gfs2_struct2blk - compute stuff | |
39 | * @sdp: the filesystem | |
40 | * @nstruct: the number of structures | |
b3b94faa DT |
41 | * |
42 | * Compute the number of log descriptor blocks needed to hold a certain number | |
43 | * of structures of a certain size. | |
44 | * | |
45 | * Returns: the number of blocks needed (minimum is always 1) | |
46 | */ | |
47 | ||
2e9eeaa1 | 48 | unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct) |
b3b94faa DT |
49 | { |
50 | unsigned int blks; | |
51 | unsigned int first, second; | |
52 | ||
6188e877 | 53 | /* The initial struct gfs2_log_descriptor block */ |
b3b94faa | 54 | blks = 1; |
2e9eeaa1 | 55 | first = sdp->sd_ldptrs; |
b3b94faa DT |
56 | |
57 | if (nstruct > first) { | |
6188e877 | 58 | /* Subsequent struct gfs2_meta_header blocks */ |
2e9eeaa1 | 59 | second = sdp->sd_inptrs; |
5c676f6d | 60 | blks += DIV_ROUND_UP(nstruct - first, second); |
b3b94faa DT |
61 | } |
62 | ||
63 | return blks; | |
64 | } | |
65 | ||
1e1a3d03 SW |
66 | /** |
67 | * gfs2_remove_from_ail - Remove an entry from the ail lists, updating counters | |
1e1a3d03 SW |
68 | * @bd: The gfs2_bufdata to remove |
69 | * | |
c618e87a | 70 | * The ail lock _must_ be held when calling this function |
1e1a3d03 SW |
71 | * |
72 | */ | |
73 | ||
68942870 | 74 | void gfs2_remove_from_ail(struct gfs2_bufdata *bd) |
1e1a3d03 | 75 | { |
16ca9412 | 76 | bd->bd_tr = NULL; |
1ad38c43 SW |
77 | list_del_init(&bd->bd_ail_st_list); |
78 | list_del_init(&bd->bd_ail_gl_list); | |
1e1a3d03 | 79 | atomic_dec(&bd->bd_gl->gl_ail_count); |
1e1a3d03 SW |
80 | brelse(bd->bd_bh); |
81 | } | |
82 | ||
3822a7c4 | 83 | static int __gfs2_writepage(struct folio *folio, struct writeback_control *wbc, |
95ecbd0f AG |
84 | void *data) |
85 | { | |
86 | struct address_space *mapping = data; | |
3822a7c4 | 87 | int ret = mapping->a_ops->writepage(&folio->page, wbc); |
95ecbd0f AG |
88 | mapping_set_error(mapping, ret); |
89 | return ret; | |
90 | } | |
91 | ||
ddacfaf7 | 92 | /** |
c551f66c LJ |
93 | * gfs2_ail1_start_one - Start I/O on a transaction |
94 | * @sdp: The superblock | |
4667a0ec | 95 | * @wbc: The writeback control structure |
c551f66c LJ |
96 | * @tr: The transaction to start I/O on |
97 | * @plug: The block plug currently active | |
ddacfaf7 SW |
98 | */ |
99 | ||
4f1de018 SW |
100 | static int gfs2_ail1_start_one(struct gfs2_sbd *sdp, |
101 | struct writeback_control *wbc, | |
17d77684 | 102 | struct gfs2_trans *tr, struct blk_plug *plug) |
d6a079e8 DC |
103 | __releases(&sdp->sd_ail_lock) |
104 | __acquires(&sdp->sd_ail_lock) | |
ddacfaf7 | 105 | { |
5ac048bb | 106 | struct gfs2_glock *gl = NULL; |
4667a0ec | 107 | struct address_space *mapping; |
ddacfaf7 SW |
108 | struct gfs2_bufdata *bd, *s; |
109 | struct buffer_head *bh; | |
b1676cbb | 110 | int ret = 0; |
ddacfaf7 | 111 | |
16ca9412 | 112 | list_for_each_entry_safe_reverse(bd, s, &tr->tr_ail1_list, bd_ail_st_list) { |
4667a0ec | 113 | bh = bd->bd_bh; |
ddacfaf7 | 114 | |
16ca9412 | 115 | gfs2_assert(sdp, bd->bd_tr == tr); |
ddacfaf7 | 116 | |
4667a0ec | 117 | if (!buffer_busy(bh)) { |
30fe70a8 BP |
118 | if (buffer_uptodate(bh)) { |
119 | list_move(&bd->bd_ail_st_list, | |
120 | &tr->tr_ail2_list); | |
121 | continue; | |
122 | } | |
036330c9 | 123 | if (!cmpxchg(&sdp->sd_log_error, 0, -EIO)) { |
4667a0ec | 124 | gfs2_io_error_bh(sdp, bh); |
69511080 | 125 | gfs2_withdraw_delayed(sdp); |
9e1a9ecd | 126 | } |
4667a0ec SW |
127 | } |
128 | ||
4d927b03 | 129 | if (gfs2_withdrawing_or_withdrawn(sdp)) { |
30fe70a8 BP |
130 | gfs2_remove_from_ail(bd); |
131 | continue; | |
132 | } | |
4667a0ec SW |
133 | if (!buffer_dirty(bh)) |
134 | continue; | |
135 | if (gl == bd->bd_gl) | |
136 | continue; | |
137 | gl = bd->bd_gl; | |
16ca9412 | 138 | list_move(&bd->bd_ail_st_list, &tr->tr_ail1_list); |
11551cf1 | 139 | mapping = bh->b_folio->mapping; |
4f1de018 SW |
140 | if (!mapping) |
141 | continue; | |
4667a0ec | 142 | spin_unlock(&sdp->sd_ail_lock); |
95ecbd0f | 143 | ret = write_cache_pages(mapping, wbc, __gfs2_writepage, mapping); |
17d77684 BP |
144 | if (need_resched()) { |
145 | blk_finish_plug(plug); | |
146 | cond_resched(); | |
147 | blk_start_plug(plug); | |
148 | } | |
4667a0ec | 149 | spin_lock(&sdp->sd_ail_lock); |
4e79e3f0 BP |
150 | if (ret == -ENODATA) /* if a jdata write into a new hole */ |
151 | ret = 0; /* ignore it */ | |
b1676cbb | 152 | if (ret || wbc->nr_to_write <= 0) |
4667a0ec | 153 | break; |
b1676cbb | 154 | return -EBUSY; |
4667a0ec | 155 | } |
4f1de018 | 156 | |
b1676cbb | 157 | return ret; |
4667a0ec | 158 | } |
ddacfaf7 | 159 | |
9592ea80 BP |
160 | static void dump_ail_list(struct gfs2_sbd *sdp) |
161 | { | |
162 | struct gfs2_trans *tr; | |
163 | struct gfs2_bufdata *bd; | |
164 | struct buffer_head *bh; | |
165 | ||
9592ea80 BP |
166 | list_for_each_entry_reverse(tr, &sdp->sd_ail1_list, tr_list) { |
167 | list_for_each_entry_reverse(bd, &tr->tr_ail1_list, | |
168 | bd_ail_st_list) { | |
169 | bh = bd->bd_bh; | |
170 | fs_err(sdp, "bd %p: blk:0x%llx bh=%p ", bd, | |
171 | (unsigned long long)bd->bd_blkno, bh); | |
172 | if (!bh) { | |
173 | fs_err(sdp, "\n"); | |
174 | continue; | |
175 | } | |
176 | fs_err(sdp, "0x%llx up2:%d dirt:%d lkd:%d req:%d " | |
177 | "map:%d new:%d ar:%d aw:%d delay:%d " | |
178 | "io err:%d unwritten:%d dfr:%d pin:%d esc:%d\n", | |
179 | (unsigned long long)bh->b_blocknr, | |
180 | buffer_uptodate(bh), buffer_dirty(bh), | |
181 | buffer_locked(bh), buffer_req(bh), | |
182 | buffer_mapped(bh), buffer_new(bh), | |
183 | buffer_async_read(bh), buffer_async_write(bh), | |
184 | buffer_delay(bh), buffer_write_io_error(bh), | |
185 | buffer_unwritten(bh), | |
186 | buffer_defer_completion(bh), | |
187 | buffer_pinned(bh), buffer_escaped(bh)); | |
188 | } | |
189 | } | |
190 | } | |
ddacfaf7 | 191 | |
4667a0ec SW |
192 | /** |
193 | * gfs2_ail1_flush - start writeback of some ail1 entries | |
194 | * @sdp: The super block | |
195 | * @wbc: The writeback control structure | |
196 | * | |
197 | * Writes back some ail1 entries, according to the limits in the | |
198 | * writeback control structure | |
199 | */ | |
ddacfaf7 | 200 | |
4667a0ec SW |
201 | void gfs2_ail1_flush(struct gfs2_sbd *sdp, struct writeback_control *wbc) |
202 | { | |
203 | struct list_head *head = &sdp->sd_ail1_list; | |
16ca9412 | 204 | struct gfs2_trans *tr; |
885bceca | 205 | struct blk_plug plug; |
75b46c43 | 206 | int ret; |
9592ea80 | 207 | unsigned long flush_start = jiffies; |
ddacfaf7 | 208 | |
c83ae9ca | 209 | trace_gfs2_ail_flush(sdp, wbc, 1); |
885bceca | 210 | blk_start_plug(&plug); |
4667a0ec | 211 | spin_lock(&sdp->sd_ail_lock); |
4f1de018 | 212 | restart: |
75b46c43 | 213 | ret = 0; |
9592ea80 | 214 | if (time_after(jiffies, flush_start + (HZ * 600))) { |
d5dc3d96 BP |
215 | fs_err(sdp, "Error: In %s for ten minutes! t=%d\n", |
216 | __func__, current->journal_info ? 1 : 0); | |
9592ea80 BP |
217 | dump_ail_list(sdp); |
218 | goto out; | |
219 | } | |
16ca9412 | 220 | list_for_each_entry_reverse(tr, head, tr_list) { |
4667a0ec | 221 | if (wbc->nr_to_write <= 0) |
ddacfaf7 | 222 | break; |
17d77684 | 223 | ret = gfs2_ail1_start_one(sdp, wbc, tr, &plug); |
b1676cbb BP |
224 | if (ret) { |
225 | if (ret == -EBUSY) | |
226 | goto restart; | |
227 | break; | |
228 | } | |
4667a0ec | 229 | } |
9592ea80 | 230 | out: |
4667a0ec | 231 | spin_unlock(&sdp->sd_ail_lock); |
885bceca | 232 | blk_finish_plug(&plug); |
49003128 | 233 | if (ret) { |
b2b0a5e9 | 234 | gfs2_lm(sdp, "gfs2_ail1_start_one returned: %d\n", ret); |
badb55ec | 235 | gfs2_withdraw(sdp); |
49003128 | 236 | } |
c83ae9ca | 237 | trace_gfs2_ail_flush(sdp, wbc, 0); |
4667a0ec SW |
238 | } |
239 | ||
240 | /** | |
241 | * gfs2_ail1_start - start writeback of all ail1 entries | |
242 | * @sdp: The superblock | |
243 | */ | |
244 | ||
245 | static void gfs2_ail1_start(struct gfs2_sbd *sdp) | |
246 | { | |
247 | struct writeback_control wbc = { | |
248 | .sync_mode = WB_SYNC_NONE, | |
249 | .nr_to_write = LONG_MAX, | |
250 | .range_start = 0, | |
251 | .range_end = LLONG_MAX, | |
252 | }; | |
253 | ||
254 | return gfs2_ail1_flush(sdp, &wbc); | |
ddacfaf7 SW |
255 | } |
256 | ||
5cb738b5 AG |
257 | static void gfs2_log_update_flush_tail(struct gfs2_sbd *sdp) |
258 | { | |
259 | unsigned int new_flush_tail = sdp->sd_log_head; | |
260 | struct gfs2_trans *tr; | |
261 | ||
262 | if (!list_empty(&sdp->sd_ail1_list)) { | |
263 | tr = list_last_entry(&sdp->sd_ail1_list, | |
264 | struct gfs2_trans, tr_list); | |
265 | new_flush_tail = tr->tr_first; | |
266 | } | |
267 | sdp->sd_log_flush_tail = new_flush_tail; | |
268 | } | |
269 | ||
270 | static void gfs2_log_update_head(struct gfs2_sbd *sdp) | |
271 | { | |
272 | unsigned int new_head = sdp->sd_log_flush_head; | |
273 | ||
274 | if (sdp->sd_log_flush_tail == sdp->sd_log_head) | |
275 | sdp->sd_log_flush_tail = new_head; | |
276 | sdp->sd_log_head = new_head; | |
277 | } | |
278 | ||
c551f66c | 279 | /* |
76fce654 AG |
280 | * gfs2_ail_empty_tr - empty one of the ail lists of a transaction |
281 | */ | |
282 | ||
283 | static void gfs2_ail_empty_tr(struct gfs2_sbd *sdp, struct gfs2_trans *tr, | |
284 | struct list_head *head) | |
285 | { | |
286 | struct gfs2_bufdata *bd; | |
287 | ||
288 | while (!list_empty(head)) { | |
289 | bd = list_first_entry(head, struct gfs2_bufdata, | |
290 | bd_ail_st_list); | |
291 | gfs2_assert(sdp, bd->bd_tr == tr); | |
292 | gfs2_remove_from_ail(bd); | |
293 | } | |
294 | } | |
295 | ||
ddacfaf7 SW |
296 | /** |
297 | * gfs2_ail1_empty_one - Check whether or not a trans in the AIL has been synced | |
298 | * @sdp: the filesystem | |
5e4c7632 BP |
299 | * @tr: the transaction |
300 | * @max_revokes: If nonzero, issue revokes for the bd items for written buffers | |
ddacfaf7 | 301 | * |
36c78309 | 302 | * returns: the transaction's count of remaining active items |
ddacfaf7 SW |
303 | */ |
304 | ||
36c78309 | 305 | static int gfs2_ail1_empty_one(struct gfs2_sbd *sdp, struct gfs2_trans *tr, |
5e4c7632 | 306 | int *max_revokes) |
ddacfaf7 SW |
307 | { |
308 | struct gfs2_bufdata *bd, *s; | |
309 | struct buffer_head *bh; | |
36c78309 | 310 | int active_count = 0; |
ddacfaf7 | 311 | |
16ca9412 | 312 | list_for_each_entry_safe_reverse(bd, s, &tr->tr_ail1_list, |
ddacfaf7 SW |
313 | bd_ail_st_list) { |
314 | bh = bd->bd_bh; | |
16ca9412 | 315 | gfs2_assert(sdp, bd->bd_tr == tr); |
036330c9 BP |
316 | /* |
317 | * If another process flagged an io error, e.g. writing to the | |
318 | * journal, error all other bhs and move them off the ail1 to | |
319 | * prevent a tight loop when unmount tries to flush ail1, | |
320 | * regardless of whether they're still busy. If no outside | |
321 | * errors were found and the buffer is busy, move to the next. | |
322 | * If the ail buffer is not busy and caught an error, flag it | |
323 | * for others. | |
324 | */ | |
36c78309 BP |
325 | if (!sdp->sd_log_error && buffer_busy(bh)) { |
326 | active_count++; | |
4667a0ec | 327 | continue; |
36c78309 | 328 | } |
b524abcc | 329 | if (!buffer_uptodate(bh) && |
036330c9 | 330 | !cmpxchg(&sdp->sd_log_error, 0, -EIO)) { |
ddacfaf7 | 331 | gfs2_io_error_bh(sdp, bh); |
69511080 | 332 | gfs2_withdraw_delayed(sdp); |
9e1a9ecd | 333 | } |
5e4c7632 BP |
334 | /* |
335 | * If we have space for revokes and the bd is no longer on any | |
336 | * buf list, we can just add a revoke for it immediately and | |
337 | * avoid having to put it on the ail2 list, where it would need | |
338 | * to be revoked later. | |
339 | */ | |
340 | if (*max_revokes && list_empty(&bd->bd_list)) { | |
341 | gfs2_add_revoke(sdp, bd); | |
342 | (*max_revokes)--; | |
343 | continue; | |
344 | } | |
16ca9412 | 345 | list_move(&bd->bd_ail_st_list, &tr->tr_ail2_list); |
ddacfaf7 | 346 | } |
36c78309 | 347 | return active_count; |
ddacfaf7 SW |
348 | } |
349 | ||
4667a0ec SW |
350 | /** |
351 | * gfs2_ail1_empty - Try to empty the ail1 lists | |
352 | * @sdp: The superblock | |
5e4c7632 | 353 | * @max_revokes: If non-zero, add revokes where appropriate |
4667a0ec | 354 | * |
47106428 AG |
355 | * Tries to empty the ail1 lists, starting with the oldest first. |
356 | * Returns %true if the ail1 list is now empty. | |
4667a0ec | 357 | */ |
b3b94faa | 358 | |
47106428 | 359 | static bool gfs2_ail1_empty(struct gfs2_sbd *sdp, int max_revokes) |
b3b94faa | 360 | { |
16ca9412 | 361 | struct gfs2_trans *tr, *s; |
5d054964 | 362 | int oldest_tr = 1; |
47106428 | 363 | bool empty; |
b3b94faa | 364 | |
d6a079e8 | 365 | spin_lock(&sdp->sd_ail_lock); |
16ca9412 | 366 | list_for_each_entry_safe_reverse(tr, s, &sdp->sd_ail1_list, tr_list) { |
36c78309 | 367 | if (!gfs2_ail1_empty_one(sdp, tr, &max_revokes) && oldest_tr) |
16ca9412 | 368 | list_move(&tr->tr_list, &sdp->sd_ail2_list); |
4667a0ec | 369 | else |
5d054964 | 370 | oldest_tr = 0; |
b3b94faa | 371 | } |
5cb738b5 | 372 | gfs2_log_update_flush_tail(sdp); |
47106428 | 373 | empty = list_empty(&sdp->sd_ail1_list); |
d6a079e8 | 374 | spin_unlock(&sdp->sd_ail_lock); |
b3b94faa | 375 | |
47106428 | 376 | return empty; |
b3b94faa DT |
377 | } |
378 | ||
26b06a69 SW |
379 | static void gfs2_ail1_wait(struct gfs2_sbd *sdp) |
380 | { | |
16ca9412 | 381 | struct gfs2_trans *tr; |
26b06a69 SW |
382 | struct gfs2_bufdata *bd; |
383 | struct buffer_head *bh; | |
384 | ||
385 | spin_lock(&sdp->sd_ail_lock); | |
16ca9412 BM |
386 | list_for_each_entry_reverse(tr, &sdp->sd_ail1_list, tr_list) { |
387 | list_for_each_entry(bd, &tr->tr_ail1_list, bd_ail_st_list) { | |
26b06a69 SW |
388 | bh = bd->bd_bh; |
389 | if (!buffer_locked(bh)) | |
390 | continue; | |
391 | get_bh(bh); | |
392 | spin_unlock(&sdp->sd_ail_lock); | |
393 | wait_on_buffer(bh); | |
394 | brelse(bh); | |
395 | return; | |
396 | } | |
397 | } | |
398 | spin_unlock(&sdp->sd_ail_lock); | |
399 | } | |
ddacfaf7 | 400 | |
6e80674a | 401 | static void __ail2_empty(struct gfs2_sbd *sdp, struct gfs2_trans *tr) |
ddacfaf7 | 402 | { |
6e80674a AG |
403 | gfs2_ail_empty_tr(sdp, tr, &tr->tr_ail2_list); |
404 | list_del(&tr->tr_list); | |
405 | gfs2_assert_warn(sdp, list_empty(&tr->tr_ail1_list)); | |
406 | gfs2_assert_warn(sdp, list_empty(&tr->tr_ail2_list)); | |
407 | gfs2_trans_free(sdp, tr); | |
ddacfaf7 SW |
408 | } |
409 | ||
b3b94faa DT |
410 | static void ail2_empty(struct gfs2_sbd *sdp, unsigned int new_tail) |
411 | { | |
6e80674a | 412 | struct list_head *ail2_list = &sdp->sd_ail2_list; |
b3b94faa | 413 | unsigned int old_tail = sdp->sd_log_tail; |
6e80674a | 414 | struct gfs2_trans *tr, *safe; |
b3b94faa | 415 | |
d6a079e8 | 416 | spin_lock(&sdp->sd_ail_lock); |
6e80674a AG |
417 | if (old_tail <= new_tail) { |
418 | list_for_each_entry_safe(tr, safe, ail2_list, tr_list) { | |
419 | if (old_tail <= tr->tr_first && tr->tr_first < new_tail) | |
420 | __ail2_empty(sdp, tr); | |
421 | } | |
422 | } else { | |
423 | list_for_each_entry_safe(tr, safe, ail2_list, tr_list) { | |
424 | if (old_tail <= tr->tr_first || tr->tr_first < new_tail) | |
425 | __ail2_empty(sdp, tr); | |
426 | } | |
b3b94faa | 427 | } |
d6a079e8 | 428 | spin_unlock(&sdp->sd_ail_lock); |
b3b94faa | 429 | } |
b3b94faa | 430 | |
f3708fb5 AG |
431 | /** |
432 | * gfs2_log_is_empty - Check if the log is empty | |
433 | * @sdp: The GFS2 superblock | |
434 | */ | |
b3b94faa | 435 | |
f3708fb5 AG |
436 | bool gfs2_log_is_empty(struct gfs2_sbd *sdp) { |
437 | return atomic_read(&sdp->sd_log_blks_free) == sdp->sd_jdesc->jd_blocks; | |
438 | } | |
439 | ||
2129b428 AG |
440 | static bool __gfs2_log_try_reserve_revokes(struct gfs2_sbd *sdp, unsigned int revokes) |
441 | { | |
442 | unsigned int available; | |
443 | ||
444 | available = atomic_read(&sdp->sd_log_revokes_available); | |
445 | while (available >= revokes) { | |
446 | if (atomic_try_cmpxchg(&sdp->sd_log_revokes_available, | |
447 | &available, available - revokes)) | |
448 | return true; | |
b3b94faa | 449 | } |
2129b428 AG |
450 | return false; |
451 | } | |
b3b94faa | 452 | |
2129b428 AG |
453 | /** |
454 | * gfs2_log_release_revokes - Release a given number of revokes | |
455 | * @sdp: The GFS2 superblock | |
456 | * @revokes: The number of revokes to release | |
457 | * | |
458 | * sdp->sd_log_flush_lock must be held. | |
459 | */ | |
460 | void gfs2_log_release_revokes(struct gfs2_sbd *sdp, unsigned int revokes) | |
461 | { | |
462 | if (revokes) | |
463 | atomic_add(revokes, &sdp->sd_log_revokes_available); | |
b3b94faa DT |
464 | } |
465 | ||
24972557 BM |
466 | /** |
467 | * gfs2_log_release - Release a given number of log blocks | |
468 | * @sdp: The GFS2 superblock | |
469 | * @blks: The number of blocks | |
470 | * | |
471 | */ | |
472 | ||
473 | void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks) | |
474 | { | |
24972557 BM |
475 | atomic_add(blks, &sdp->sd_log_blks_free); |
476 | trace_gfs2_log_blocks(sdp, blks); | |
477 | gfs2_assert_withdraw(sdp, atomic_read(&sdp->sd_log_blks_free) <= | |
478 | sdp->sd_jdesc->jd_blocks); | |
5ae8fff8 AG |
479 | if (atomic_read(&sdp->sd_log_blks_needed)) |
480 | wake_up(&sdp->sd_log_waitq); | |
24972557 BM |
481 | } |
482 | ||
b3b94faa | 483 | /** |
fe3e3976 AG |
484 | * __gfs2_log_try_reserve - Try to make a log reservation |
485 | * @sdp: The GFS2 superblock | |
486 | * @blks: The number of blocks to reserve | |
487 | * @taboo_blks: The number of blocks to leave free | |
488 | * | |
489 | * Try to do the same as __gfs2_log_reserve(), but fail if no more log | |
490 | * space is immediately available. | |
491 | */ | |
492 | static bool __gfs2_log_try_reserve(struct gfs2_sbd *sdp, unsigned int blks, | |
493 | unsigned int taboo_blks) | |
494 | { | |
495 | unsigned wanted = blks + taboo_blks; | |
496 | unsigned int free_blocks; | |
497 | ||
498 | free_blocks = atomic_read(&sdp->sd_log_blks_free); | |
499 | while (free_blocks >= wanted) { | |
500 | if (atomic_try_cmpxchg(&sdp->sd_log_blks_free, &free_blocks, | |
501 | free_blocks - blks)) { | |
502 | trace_gfs2_log_blocks(sdp, -blks); | |
503 | return true; | |
504 | } | |
505 | } | |
506 | return false; | |
507 | } | |
508 | ||
509 | /** | |
510 | * __gfs2_log_reserve - Make a log reservation | |
b3b94faa DT |
511 | * @sdp: The GFS2 superblock |
512 | * @blks: The number of blocks to reserve | |
fe3e3976 | 513 | * @taboo_blks: The number of blocks to leave free |
b3b94faa | 514 | * |
fe3e3976 AG |
515 | * @taboo_blks is set to 0 for logd, and to GFS2_LOG_FLUSH_MIN_BLOCKS |
516 | * for all other processes. This ensures that when the log is almost full, | |
517 | * logd will still be able to call gfs2_log_flush one more time without | |
518 | * blocking, which will advance the tail and make some more log space | |
519 | * available. | |
b004157a | 520 | * |
5e687eac BM |
521 | * We no longer flush the log here, instead we wake up logd to do that |
522 | * for us. To avoid the thundering herd and to ensure that we deal fairly | |
523 | * with queued waiters, we use an exclusive wait. This means that when we | |
524 | * get woken with enough journal space to get our reservation, we need to | |
525 | * wake the next waiter on the list. | |
b3b94faa DT |
526 | */ |
527 | ||
fe3e3976 AG |
528 | static void __gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks, |
529 | unsigned int taboo_blks) | |
b3b94faa | 530 | { |
fe3e3976 | 531 | unsigned wanted = blks + taboo_blks; |
5e687eac | 532 | unsigned int free_blocks; |
b3b94faa | 533 | |
f07b3520 | 534 | atomic_add(blks, &sdp->sd_log_blks_needed); |
5ae8fff8 AG |
535 | for (;;) { |
536 | if (current != sdp->sd_logd_process) | |
5e687eac | 537 | wake_up(&sdp->sd_logd_waitq); |
5ae8fff8 AG |
538 | io_wait_event(sdp->sd_log_waitq, |
539 | (free_blocks = atomic_read(&sdp->sd_log_blks_free), | |
540 | free_blocks >= wanted)); | |
541 | do { | |
542 | if (atomic_try_cmpxchg(&sdp->sd_log_blks_free, | |
543 | &free_blocks, | |
544 | free_blocks - blks)) | |
545 | goto reserved; | |
546 | } while (free_blocks >= wanted); | |
2e60d768 | 547 | } |
5e687eac | 548 | |
5ae8fff8 AG |
549 | reserved: |
550 | trace_gfs2_log_blocks(sdp, -blks); | |
551 | if (atomic_sub_return(blks, &sdp->sd_log_blks_needed)) | |
5e687eac | 552 | wake_up(&sdp->sd_log_waitq); |
b3b94faa DT |
553 | } |
554 | ||
fe3e3976 | 555 | /** |
2129b428 | 556 | * gfs2_log_try_reserve - Try to make a log reservation |
fe3e3976 | 557 | * @sdp: The GFS2 superblock |
2129b428 AG |
558 | * @tr: The transaction |
559 | * @extra_revokes: The number of additional revokes reserved (output) | |
560 | * | |
561 | * This is similar to gfs2_log_reserve, but sdp->sd_log_flush_lock must be | |
562 | * held for correct revoke accounting. | |
fe3e3976 | 563 | */ |
484adff8 | 564 | |
2129b428 AG |
565 | bool gfs2_log_try_reserve(struct gfs2_sbd *sdp, struct gfs2_trans *tr, |
566 | unsigned int *extra_revokes) | |
fe3e3976 | 567 | { |
2129b428 AG |
568 | unsigned int blks = tr->tr_reserved; |
569 | unsigned int revokes = tr->tr_revokes; | |
570 | unsigned int revoke_blks = 0; | |
571 | ||
572 | *extra_revokes = 0; | |
573 | if (revokes && !__gfs2_log_try_reserve_revokes(sdp, revokes)) { | |
574 | revoke_blks = DIV_ROUND_UP(revokes, sdp->sd_inptrs); | |
575 | *extra_revokes = revoke_blks * sdp->sd_inptrs - revokes; | |
576 | blks += revoke_blks; | |
24972557 | 577 | } |
2129b428 AG |
578 | if (!blks) |
579 | return true; | |
fe3e3976 | 580 | if (__gfs2_log_try_reserve(sdp, blks, GFS2_LOG_FLUSH_MIN_BLOCKS)) |
2129b428 AG |
581 | return true; |
582 | if (!revoke_blks) | |
583 | gfs2_log_release_revokes(sdp, revokes); | |
584 | return false; | |
585 | } | |
586 | ||
587 | /** | |
588 | * gfs2_log_reserve - Make a log reservation | |
589 | * @sdp: The GFS2 superblock | |
590 | * @tr: The transaction | |
591 | * @extra_revokes: The number of additional revokes reserved (output) | |
592 | * | |
593 | * sdp->sd_log_flush_lock must not be held. | |
594 | */ | |
595 | ||
596 | void gfs2_log_reserve(struct gfs2_sbd *sdp, struct gfs2_trans *tr, | |
597 | unsigned int *extra_revokes) | |
598 | { | |
599 | unsigned int blks = tr->tr_reserved; | |
600 | unsigned int revokes = tr->tr_revokes; | |
dc7674ed | 601 | unsigned int revoke_blks; |
2129b428 AG |
602 | |
603 | *extra_revokes = 0; | |
604 | if (revokes) { | |
605 | revoke_blks = DIV_ROUND_UP(revokes, sdp->sd_inptrs); | |
606 | *extra_revokes = revoke_blks * sdp->sd_inptrs - revokes; | |
607 | blks += revoke_blks; | |
608 | } | |
fe3e3976 | 609 | __gfs2_log_reserve(sdp, blks, GFS2_LOG_FLUSH_MIN_BLOCKS); |
b3b94faa DT |
610 | } |
611 | ||
b3b94faa DT |
612 | /** |
613 | * log_distance - Compute distance between two journal blocks | |
614 | * @sdp: The GFS2 superblock | |
615 | * @newer: The most recent journal block of the pair | |
616 | * @older: The older journal block of the pair | |
617 | * | |
618 | * Compute the distance (in the journal direction) between two | |
619 | * blocks in the journal | |
620 | * | |
621 | * Returns: the distance in blocks | |
622 | */ | |
623 | ||
faa31ce8 | 624 | static inline unsigned int log_distance(struct gfs2_sbd *sdp, unsigned int newer, |
b3b94faa DT |
625 | unsigned int older) |
626 | { | |
627 | int dist; | |
628 | ||
629 | dist = newer - older; | |
630 | if (dist < 0) | |
631 | dist += sdp->sd_jdesc->jd_blocks; | |
632 | ||
633 | return dist; | |
634 | } | |
635 | ||
2332c443 | 636 | /** |
6188e877 | 637 | * calc_reserved - Calculate the number of blocks to keep reserved |
2332c443 RP |
638 | * @sdp: The GFS2 superblock |
639 | * | |
640 | * This is complex. We need to reserve room for all our currently used | |
6188e877 AG |
641 | * metadata blocks (e.g. normal file I/O rewriting file time stamps) and |
642 | * all our journaled data blocks for journaled files (e.g. files in the | |
2332c443 | 643 | * meta_fs like rindex, or files for which chattr +j was done.) |
6188e877 | 644 | * If we don't reserve enough space, corruption will follow. |
2332c443 | 645 | * |
6188e877 AG |
646 | * We can have metadata blocks and jdata blocks in the same journal. Each |
647 | * type gets its own log descriptor, for which we need to reserve a block. | |
648 | * In fact, each type has the potential for needing more than one log descriptor | |
649 | * in cases where we have more blocks than will fit in a log descriptor. | |
2332c443 | 650 | * Metadata journal entries take up half the space of journaled buffer entries. |
2332c443 RP |
651 | * |
652 | * Also, we need to reserve blocks for revoke journal entries and one for an | |
653 | * overall header for the lot. | |
654 | * | |
655 | * Returns: the number of blocks reserved | |
656 | */ | |
657 | static unsigned int calc_reserved(struct gfs2_sbd *sdp) | |
658 | { | |
fe3e3976 | 659 | unsigned int reserved = GFS2_LOG_FLUSH_MIN_BLOCKS; |
71b219f4 | 660 | unsigned int blocks; |
022ef4fe | 661 | struct gfs2_trans *tr = sdp->sd_log_tr; |
2332c443 | 662 | |
022ef4fe | 663 | if (tr) { |
71b219f4 AG |
664 | blocks = tr->tr_num_buf_new - tr->tr_num_buf_rm; |
665 | reserved += blocks + DIV_ROUND_UP(blocks, buf_limit(sdp)); | |
666 | blocks = tr->tr_num_databuf_new - tr->tr_num_databuf_rm; | |
667 | reserved += blocks + DIV_ROUND_UP(blocks, databuf_limit(sdp)); | |
022ef4fe | 668 | } |
2332c443 RP |
669 | return reserved; |
670 | } | |
671 | ||
5cb738b5 | 672 | static void log_pull_tail(struct gfs2_sbd *sdp) |
b3b94faa | 673 | { |
5cb738b5 AG |
674 | unsigned int new_tail = sdp->sd_log_flush_tail; |
675 | unsigned int dist; | |
b3b94faa | 676 | |
5cb738b5 AG |
677 | if (new_tail == sdp->sd_log_tail) |
678 | return; | |
679 | dist = log_distance(sdp, new_tail, sdp->sd_log_tail); | |
b3b94faa | 680 | ail2_empty(sdp, new_tail); |
c1eba1b0 | 681 | gfs2_log_release(sdp, dist); |
b3b94faa DT |
682 | sdp->sd_log_tail = new_tail; |
683 | } | |
684 | ||
b3b94faa | 685 | |
9ff78289 | 686 | void log_flush_wait(struct gfs2_sbd *sdp) |
b3b94faa | 687 | { |
16615be1 SW |
688 | DEFINE_WAIT(wait); |
689 | ||
690 | if (atomic_read(&sdp->sd_log_in_flight)) { | |
691 | do { | |
692 | prepare_to_wait(&sdp->sd_log_flush_wait, &wait, | |
693 | TASK_UNINTERRUPTIBLE); | |
694 | if (atomic_read(&sdp->sd_log_in_flight)) | |
695 | io_schedule(); | |
696 | } while(atomic_read(&sdp->sd_log_in_flight)); | |
697 | finish_wait(&sdp->sd_log_flush_wait, &wait); | |
b3b94faa | 698 | } |
b3b94faa DT |
699 | } |
700 | ||
4f0f586b | 701 | static int ip_cmp(void *priv, const struct list_head *a, const struct list_head *b) |
4a36d08d | 702 | { |
45138990 | 703 | struct gfs2_inode *ipa, *ipb; |
4a36d08d | 704 | |
45138990 SW |
705 | ipa = list_entry(a, struct gfs2_inode, i_ordered); |
706 | ipb = list_entry(b, struct gfs2_inode, i_ordered); | |
4a36d08d | 707 | |
45138990 | 708 | if (ipa->i_no_addr < ipb->i_no_addr) |
4a36d08d | 709 | return -1; |
45138990 | 710 | if (ipa->i_no_addr > ipb->i_no_addr) |
4a36d08d BP |
711 | return 1; |
712 | return 0; | |
713 | } | |
714 | ||
7542486b BP |
715 | static void __ordered_del_inode(struct gfs2_inode *ip) |
716 | { | |
717 | if (!list_empty(&ip->i_ordered)) | |
718 | list_del_init(&ip->i_ordered); | |
719 | } | |
720 | ||
d7b616e2 SW |
721 | static void gfs2_ordered_write(struct gfs2_sbd *sdp) |
722 | { | |
45138990 | 723 | struct gfs2_inode *ip; |
d7b616e2 SW |
724 | LIST_HEAD(written); |
725 | ||
45138990 | 726 | spin_lock(&sdp->sd_ordered_lock); |
a5b1d3fc AG |
727 | list_sort(NULL, &sdp->sd_log_ordered, &ip_cmp); |
728 | while (!list_empty(&sdp->sd_log_ordered)) { | |
969183bc | 729 | ip = list_first_entry(&sdp->sd_log_ordered, struct gfs2_inode, i_ordered); |
1f23bc78 | 730 | if (ip->i_inode.i_mapping->nrpages == 0) { |
7542486b | 731 | __ordered_del_inode(ip); |
d7b616e2 | 732 | continue; |
1f23bc78 AD |
733 | } |
734 | list_move(&ip->i_ordered, &written); | |
45138990 SW |
735 | spin_unlock(&sdp->sd_ordered_lock); |
736 | filemap_fdatawrite(ip->i_inode.i_mapping); | |
737 | spin_lock(&sdp->sd_ordered_lock); | |
d7b616e2 | 738 | } |
a5b1d3fc | 739 | list_splice(&written, &sdp->sd_log_ordered); |
45138990 | 740 | spin_unlock(&sdp->sd_ordered_lock); |
d7b616e2 SW |
741 | } |
742 | ||
743 | static void gfs2_ordered_wait(struct gfs2_sbd *sdp) | |
744 | { | |
45138990 | 745 | struct gfs2_inode *ip; |
d7b616e2 | 746 | |
45138990 | 747 | spin_lock(&sdp->sd_ordered_lock); |
a5b1d3fc | 748 | while (!list_empty(&sdp->sd_log_ordered)) { |
969183bc | 749 | ip = list_first_entry(&sdp->sd_log_ordered, struct gfs2_inode, i_ordered); |
7542486b | 750 | __ordered_del_inode(ip); |
45138990 | 751 | if (ip->i_inode.i_mapping->nrpages == 0) |
d7b616e2 | 752 | continue; |
45138990 SW |
753 | spin_unlock(&sdp->sd_ordered_lock); |
754 | filemap_fdatawait(ip->i_inode.i_mapping); | |
755 | spin_lock(&sdp->sd_ordered_lock); | |
d7b616e2 | 756 | } |
45138990 SW |
757 | spin_unlock(&sdp->sd_ordered_lock); |
758 | } | |
759 | ||
760 | void gfs2_ordered_del_inode(struct gfs2_inode *ip) | |
761 | { | |
762 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); | |
763 | ||
764 | spin_lock(&sdp->sd_ordered_lock); | |
7542486b | 765 | __ordered_del_inode(ip); |
45138990 | 766 | spin_unlock(&sdp->sd_ordered_lock); |
d7b616e2 SW |
767 | } |
768 | ||
5d054964 BM |
769 | void gfs2_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd) |
770 | { | |
771 | struct buffer_head *bh = bd->bd_bh; | |
772 | struct gfs2_glock *gl = bd->bd_gl; | |
773 | ||
f4e2f5e1 AG |
774 | sdp->sd_log_num_revoke++; |
775 | if (atomic_inc_return(&gl->gl_revokes) == 1) | |
776 | gfs2_glock_hold(gl); | |
5d054964 BM |
777 | bh->b_private = NULL; |
778 | bd->bd_blkno = bh->b_blocknr; | |
9290a9a7 BP |
779 | gfs2_remove_from_ail(bd); /* drops ref on bh */ |
780 | bd->bd_bh = NULL; | |
5d054964 | 781 | set_bit(GLF_LFLUSH, &gl->gl_flags); |
a5b1d3fc | 782 | list_add(&bd->bd_list, &sdp->sd_log_revokes); |
5d054964 BM |
783 | } |
784 | ||
fe5e7ba1 BP |
785 | void gfs2_glock_remove_revoke(struct gfs2_glock *gl) |
786 | { | |
787 | if (atomic_dec_return(&gl->gl_revokes) == 0) { | |
788 | clear_bit(GLF_LFLUSH, &gl->gl_flags); | |
789 | gfs2_glock_queue_put(gl); | |
790 | } | |
791 | } | |
792 | ||
5e4c7632 | 793 | /** |
e7501bf8 | 794 | * gfs2_flush_revokes - Add as many revokes to the system transaction as we can |
5e4c7632 BP |
795 | * @sdp: The GFS2 superblock |
796 | * | |
797 | * Our usual strategy is to defer writing revokes as much as we can in the hope | |
798 | * that we'll eventually overwrite the journal, which will make those revokes | |
799 | * go away. This changes when we flush the log: at that point, there will | |
800 | * likely be some left-over space in the last revoke block of that transaction. | |
801 | * We can fill that space with additional revokes for blocks that have already | |
802 | * been written back. This will basically come at no cost now, and will save | |
803 | * us from having to keep track of those blocks on the AIL2 list later. | |
804 | */ | |
e7501bf8 | 805 | void gfs2_flush_revokes(struct gfs2_sbd *sdp) |
5d054964 | 806 | { |
5e4c7632 | 807 | /* number of revokes we still have room for */ |
2129b428 | 808 | unsigned int max_revokes = atomic_read(&sdp->sd_log_revokes_available); |
5d054964 | 809 | |
5e4c7632 | 810 | gfs2_log_lock(sdp); |
5e4c7632 | 811 | gfs2_ail1_empty(sdp, max_revokes); |
5d054964 | 812 | gfs2_log_unlock(sdp); |
e0f1f021 AG |
813 | |
814 | if (gfs2_withdrawing(sdp)) | |
815 | gfs2_withdraw(sdp); | |
5d054964 BM |
816 | } |
817 | ||
34cc1781 | 818 | /** |
7c70b896 | 819 | * gfs2_write_log_header - Write a journal log header buffer at lblock |
34cc1781 | 820 | * @sdp: The GFS2 superblock |
c1696fb8 | 821 | * @jd: journal descriptor of the journal to which we are writing |
588bff95 BP |
822 | * @seq: sequence number |
823 | * @tail: tail of the log | |
7c70b896 | 824 | * @lblock: value for lh_blkno (block number relative to start of journal) |
c1696fb8 | 825 | * @flags: log header flags GFS2_LOG_HEAD_* |
588bff95 | 826 | * @op_flags: flags to pass to the bio |
34cc1781 SW |
827 | * |
828 | * Returns: the initialized log buffer descriptor | |
829 | */ | |
830 | ||
c1696fb8 | 831 | void gfs2_write_log_header(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd, |
7c70b896 | 832 | u64 seq, u32 tail, u32 lblock, u32 flags, |
67688c08 | 833 | blk_opf_t op_flags) |
34cc1781 | 834 | { |
34cc1781 | 835 | struct gfs2_log_header *lh; |
c1696fb8 | 836 | u32 hash, crc; |
ade48088 | 837 | struct page *page; |
c1696fb8 BP |
838 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; |
839 | struct timespec64 tv; | |
840 | struct super_block *sb = sdp->sd_vfs; | |
7c70b896 | 841 | u64 dblock; |
588bff95 | 842 | |
4d927b03 | 843 | if (gfs2_withdrawing_or_withdrawn(sdp)) |
4a3d049d | 844 | return; |
ade48088 BP |
845 | |
846 | page = mempool_alloc(gfs2_page_pool, GFP_NOIO); | |
e8c92ed7 SW |
847 | lh = page_address(page); |
848 | clear_page(lh); | |
34cc1781 | 849 | |
34cc1781 SW |
850 | lh->lh_header.mh_magic = cpu_to_be32(GFS2_MAGIC); |
851 | lh->lh_header.mh_type = cpu_to_be32(GFS2_METATYPE_LH); | |
852 | lh->lh_header.__pad0 = cpu_to_be64(0); | |
853 | lh->lh_header.mh_format = cpu_to_be32(GFS2_FORMAT_LH); | |
854 | lh->lh_header.mh_jid = cpu_to_be32(sdp->sd_jdesc->jd_jid); | |
588bff95 | 855 | lh->lh_sequence = cpu_to_be64(seq); |
34cc1781 SW |
856 | lh->lh_flags = cpu_to_be32(flags); |
857 | lh->lh_tail = cpu_to_be32(tail); | |
7c70b896 | 858 | lh->lh_blkno = cpu_to_be32(lblock); |
c1696fb8 | 859 | hash = ~crc32(~0, lh, LH_V1_SIZE); |
34cc1781 SW |
860 | lh->lh_hash = cpu_to_be32(hash); |
861 | ||
ee9c7f9a | 862 | ktime_get_coarse_real_ts64(&tv); |
c1696fb8 BP |
863 | lh->lh_nsec = cpu_to_be32(tv.tv_nsec); |
864 | lh->lh_sec = cpu_to_be64(tv.tv_sec); | |
7c70b896 | 865 | if (!list_empty(&jd->extent_list)) |
19ebc050 | 866 | dblock = gfs2_log_bmap(jd, lblock); |
7c70b896 | 867 | else { |
152f58c9 AG |
868 | unsigned int extlen; |
869 | int ret; | |
870 | ||
871 | extlen = 1; | |
872 | ret = gfs2_get_extent(jd->jd_inode, lblock, &dblock, &extlen); | |
7c70b896 BP |
873 | if (gfs2_assert_withdraw(sdp, ret == 0)) |
874 | return; | |
875 | } | |
876 | lh->lh_addr = cpu_to_be64(dblock); | |
c1696fb8 BP |
877 | lh->lh_jinode = cpu_to_be64(GFS2_I(jd->jd_inode)->i_no_addr); |
878 | ||
879 | /* We may only write local statfs, quota, etc., when writing to our | |
880 | own journal. The values are left 0 when recovering a journal | |
881 | different from our own. */ | |
882 | if (!(flags & GFS2_LOG_HEAD_RECOVERY)) { | |
883 | lh->lh_statfs_addr = | |
884 | cpu_to_be64(GFS2_I(sdp->sd_sc_inode)->i_no_addr); | |
885 | lh->lh_quota_addr = | |
886 | cpu_to_be64(GFS2_I(sdp->sd_qc_inode)->i_no_addr); | |
887 | ||
888 | spin_lock(&sdp->sd_statfs_spin); | |
889 | lh->lh_local_total = cpu_to_be64(l_sc->sc_total); | |
890 | lh->lh_local_free = cpu_to_be64(l_sc->sc_free); | |
891 | lh->lh_local_dinodes = cpu_to_be64(l_sc->sc_dinodes); | |
892 | spin_unlock(&sdp->sd_statfs_spin); | |
893 | } | |
894 | ||
895 | BUILD_BUG_ON(offsetof(struct gfs2_log_header, lh_crc) != LH_V1_SIZE); | |
896 | ||
897 | crc = crc32c(~0, (void *)lh + LH_V1_SIZE + 4, | |
898 | sb->s_blocksize - LH_V1_SIZE - 4); | |
899 | lh->lh_crc = cpu_to_be32(crc); | |
900 | ||
82218943 BP |
901 | gfs2_log_write(sdp, jd, page, sb->s_blocksize, 0, dblock); |
902 | gfs2_log_submit_bio(&jd->jd_log_bio, REQ_OP_WRITE | op_flags); | |
588bff95 BP |
903 | } |
904 | ||
905 | /** | |
906 | * log_write_header - Get and initialize a journal header buffer | |
907 | * @sdp: The GFS2 superblock | |
c1696fb8 | 908 | * @flags: The log header flags, including log header origin |
588bff95 BP |
909 | * |
910 | * Returns: the initialized log buffer descriptor | |
911 | */ | |
912 | ||
913 | static void log_write_header(struct gfs2_sbd *sdp, u32 flags) | |
914 | { | |
67688c08 | 915 | blk_opf_t op_flags = REQ_PREFLUSH | REQ_FUA | REQ_META | REQ_SYNC; |
e345b87b | 916 | struct super_block *sb = sdp->sd_vfs; |
588bff95 | 917 | |
e345b87b | 918 | gfs2_assert_withdraw(sdp, sb->s_writers.frozen != SB_FREEZE_COMPLETE); |
588bff95 | 919 | |
34cc1781 SW |
920 | if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags)) { |
921 | gfs2_ordered_wait(sdp); | |
922 | log_flush_wait(sdp); | |
70fd7614 | 923 | op_flags = REQ_SYNC | REQ_META | REQ_PRIO; |
34cc1781 | 924 | } |
5cb738b5 AG |
925 | sdp->sd_log_idle = (sdp->sd_log_flush_tail == sdp->sd_log_flush_head); |
926 | gfs2_write_log_header(sdp, sdp->sd_jdesc, sdp->sd_log_sequence++, | |
927 | sdp->sd_log_flush_tail, sdp->sd_log_flush_head, | |
928 | flags, op_flags); | |
19ebc050 | 929 | gfs2_log_incr_head(sdp); |
4a3d049d | 930 | log_flush_wait(sdp); |
5cb738b5 | 931 | log_pull_tail(sdp); |
fe3e3976 | 932 | gfs2_log_update_head(sdp); |
34cc1781 SW |
933 | } |
934 | ||
2ca0c2fb | 935 | /** |
f5456b5d | 936 | * gfs2_ail_drain - drain the ail lists after a withdraw |
2ca0c2fb BP |
937 | * @sdp: Pointer to GFS2 superblock |
938 | */ | |
f5456b5d | 939 | void gfs2_ail_drain(struct gfs2_sbd *sdp) |
2ca0c2fb BP |
940 | { |
941 | struct gfs2_trans *tr; | |
942 | ||
943 | spin_lock(&sdp->sd_ail_lock); | |
944 | /* | |
945 | * For transactions on the sd_ail1_list we need to drain both the | |
946 | * ail1 and ail2 lists. That's because function gfs2_ail1_start_one | |
947 | * (temporarily) moves items from its tr_ail1 list to tr_ail2 list | |
948 | * before revokes are sent for that block. Items on the sd_ail2_list | |
949 | * should have already gotten beyond that point, so no need. | |
950 | */ | |
951 | while (!list_empty(&sdp->sd_ail1_list)) { | |
952 | tr = list_first_entry(&sdp->sd_ail1_list, struct gfs2_trans, | |
953 | tr_list); | |
954 | gfs2_ail_empty_tr(sdp, tr, &tr->tr_ail1_list); | |
955 | gfs2_ail_empty_tr(sdp, tr, &tr->tr_ail2_list); | |
956 | list_del(&tr->tr_list); | |
b839dada | 957 | gfs2_trans_free(sdp, tr); |
2ca0c2fb BP |
958 | } |
959 | while (!list_empty(&sdp->sd_ail2_list)) { | |
960 | tr = list_first_entry(&sdp->sd_ail2_list, struct gfs2_trans, | |
961 | tr_list); | |
962 | gfs2_ail_empty_tr(sdp, tr, &tr->tr_ail2_list); | |
963 | list_del(&tr->tr_list); | |
b839dada | 964 | gfs2_trans_free(sdp, tr); |
2ca0c2fb | 965 | } |
f5456b5d | 966 | gfs2_drain_revokes(sdp); |
2ca0c2fb BP |
967 | spin_unlock(&sdp->sd_ail_lock); |
968 | } | |
969 | ||
d5dc3d96 BP |
970 | /** |
971 | * empty_ail1_list - try to start IO and empty the ail1 list | |
972 | * @sdp: Pointer to GFS2 superblock | |
973 | */ | |
974 | static void empty_ail1_list(struct gfs2_sbd *sdp) | |
975 | { | |
976 | unsigned long start = jiffies; | |
47106428 | 977 | bool empty = false; |
d5dc3d96 | 978 | |
47106428 | 979 | while (!empty) { |
d5dc3d96 BP |
980 | if (time_after(jiffies, start + (HZ * 600))) { |
981 | fs_err(sdp, "Error: In %s for 10 minutes! t=%d\n", | |
982 | __func__, current->journal_info ? 1 : 0); | |
983 | dump_ail_list(sdp); | |
984 | return; | |
985 | } | |
986 | gfs2_ail1_start(sdp); | |
987 | gfs2_ail1_wait(sdp); | |
47106428 | 988 | empty = gfs2_ail1_empty(sdp, 0); |
e0f1f021 AG |
989 | |
990 | if (gfs2_withdrawing_or_withdrawn(sdp)) | |
991 | break; | |
d5dc3d96 | 992 | } |
e0f1f021 AG |
993 | |
994 | if (gfs2_withdrawing(sdp)) | |
995 | gfs2_withdraw(sdp); | |
d5dc3d96 BP |
996 | } |
997 | ||
462582b9 | 998 | /** |
521031fa | 999 | * trans_drain - drain the buf and databuf queue for a failed transaction |
462582b9 BP |
1000 | * @tr: the transaction to drain |
1001 | * | |
1002 | * When this is called, we're taking an error exit for a log write that failed | |
1003 | * but since we bypassed the after_commit functions, we need to remove the | |
1004 | * items from the buf and databuf queue. | |
1005 | */ | |
1006 | static void trans_drain(struct gfs2_trans *tr) | |
1007 | { | |
1008 | struct gfs2_bufdata *bd; | |
1009 | struct list_head *head; | |
1010 | ||
1011 | if (!tr) | |
1012 | return; | |
1013 | ||
1014 | head = &tr->tr_buf; | |
1015 | while (!list_empty(head)) { | |
1016 | bd = list_first_entry(head, struct gfs2_bufdata, bd_list); | |
1017 | list_del_init(&bd->bd_list); | |
1a5a2cfd BP |
1018 | if (!list_empty(&bd->bd_ail_st_list)) |
1019 | gfs2_remove_from_ail(bd); | |
462582b9 BP |
1020 | kmem_cache_free(gfs2_bufdata_cachep, bd); |
1021 | } | |
1022 | head = &tr->tr_databuf; | |
1023 | while (!list_empty(head)) { | |
1024 | bd = list_first_entry(head, struct gfs2_bufdata, bd_list); | |
1025 | list_del_init(&bd->bd_list); | |
1a5a2cfd BP |
1026 | if (!list_empty(&bd->bd_ail_st_list)) |
1027 | gfs2_remove_from_ail(bd); | |
462582b9 BP |
1028 | kmem_cache_free(gfs2_bufdata_cachep, bd); |
1029 | } | |
1030 | } | |
1031 | ||
b3b94faa | 1032 | /** |
b09e593d | 1033 | * gfs2_log_flush - flush incore transaction(s) |
c551f66c | 1034 | * @sdp: The filesystem |
b3b94faa | 1035 | * @gl: The glock structure to flush. If NULL, flush the whole incore log |
805c0907 | 1036 | * @flags: The log header flags: GFS2_LOG_HEAD_FLUSH_* and debug flags |
b3b94faa DT |
1037 | * |
1038 | */ | |
1039 | ||
c1696fb8 | 1040 | void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl, u32 flags) |
b3b94faa | 1041 | { |
2ca0c2fb | 1042 | struct gfs2_trans *tr = NULL; |
fe3e3976 | 1043 | unsigned int reserved_blocks = 0, used_blocks = 0; |
5432af15 | 1044 | bool frozen = test_bit(SDF_FROZEN, &sdp->sd_flags); |
fe3e3976 | 1045 | unsigned int first_log_head; |
2129b428 | 1046 | unsigned int reserved_revokes = 0; |
b3b94faa | 1047 | |
484adff8 | 1048 | down_write(&sdp->sd_log_flush_lock); |
fe3e3976 | 1049 | trace_gfs2_log_flush(sdp, 1, flags); |
f55ab26a | 1050 | |
fe3e3976 | 1051 | repeat: |
2ca0c2fb BP |
1052 | /* |
1053 | * Do this check while holding the log_flush_lock to prevent new | |
1054 | * buffers from being added to the ail via gfs2_pin() | |
1055 | */ | |
4d927b03 AG |
1056 | if (gfs2_withdrawing_or_withdrawn(sdp) || |
1057 | !test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) | |
2ca0c2fb BP |
1058 | goto out; |
1059 | ||
2bcd610d | 1060 | /* Log might have been flushed while we waited for the flush lock */ |
5a61ae14 AG |
1061 | if (gl && !test_bit(GLF_LFLUSH, &gl->gl_flags)) |
1062 | goto out; | |
f55ab26a | 1063 | |
fe3e3976 AG |
1064 | first_log_head = sdp->sd_log_head; |
1065 | sdp->sd_log_flush_head = first_log_head; | |
400ac52e | 1066 | |
16ca9412 | 1067 | tr = sdp->sd_log_tr; |
fe3e3976 AG |
1068 | if (tr || sdp->sd_log_num_revoke) { |
1069 | if (reserved_blocks) | |
1070 | gfs2_log_release(sdp, reserved_blocks); | |
1071 | reserved_blocks = sdp->sd_log_blks_reserved; | |
2129b428 | 1072 | reserved_revokes = sdp->sd_log_num_revoke; |
fe3e3976 AG |
1073 | if (tr) { |
1074 | sdp->sd_log_tr = NULL; | |
1075 | tr->tr_first = first_log_head; | |
5432af15 | 1076 | if (unlikely(frozen)) { |
fe3e3976 AG |
1077 | if (gfs2_assert_withdraw_delayed(sdp, |
1078 | !tr->tr_num_buf_new && !tr->tr_num_databuf_new)) | |
1079 | goto out_withdraw; | |
2129b428 | 1080 | } |
fe3e3976 AG |
1081 | } |
1082 | } else if (!reserved_blocks) { | |
1083 | unsigned int taboo_blocks = GFS2_LOG_FLUSH_MIN_BLOCKS; | |
1084 | ||
1085 | reserved_blocks = GFS2_LOG_FLUSH_MIN_BLOCKS; | |
1086 | if (current == sdp->sd_logd_process) | |
1087 | taboo_blocks = 0; | |
1088 | ||
1089 | if (!__gfs2_log_try_reserve(sdp, reserved_blocks, taboo_blocks)) { | |
1090 | up_write(&sdp->sd_log_flush_lock); | |
1091 | __gfs2_log_reserve(sdp, reserved_blocks, taboo_blocks); | |
1092 | down_write(&sdp->sd_log_flush_lock); | |
1093 | goto repeat; | |
1094 | } | |
2129b428 | 1095 | BUG_ON(sdp->sd_log_num_revoke); |
16ca9412 | 1096 | } |
b3b94faa | 1097 | |
fe3e3976 AG |
1098 | if (flags & GFS2_LOG_HEAD_FLUSH_SHUTDOWN) |
1099 | clear_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags); | |
1100 | ||
5432af15 | 1101 | if (unlikely(frozen)) |
2129b428 | 1102 | if (gfs2_assert_withdraw_delayed(sdp, !reserved_revokes)) |
5a61ae14 | 1103 | goto out_withdraw; |
b3b94faa | 1104 | |
d7b616e2 | 1105 | gfs2_ordered_write(sdp); |
4d927b03 | 1106 | if (gfs2_withdrawing_or_withdrawn(sdp)) |
5a61ae14 | 1107 | goto out_withdraw; |
d69a3c65 | 1108 | lops_before_commit(sdp, tr); |
4d927b03 | 1109 | if (gfs2_withdrawing_or_withdrawn(sdp)) |
5a61ae14 | 1110 | goto out_withdraw; |
82218943 | 1111 | gfs2_log_submit_bio(&sdp->sd_jdesc->jd_log_bio, REQ_OP_WRITE); |
4d927b03 | 1112 | if (gfs2_withdrawing_or_withdrawn(sdp)) |
5a61ae14 | 1113 | goto out_withdraw; |
d7b616e2 | 1114 | |
34cc1781 | 1115 | if (sdp->sd_log_head != sdp->sd_log_flush_head) { |
c1696fb8 | 1116 | log_write_header(sdp, flags); |
5cb738b5 | 1117 | } else if (sdp->sd_log_tail != sdp->sd_log_flush_tail && !sdp->sd_log_idle) { |
c1696fb8 | 1118 | log_write_header(sdp, flags); |
2332c443 | 1119 | } |
4d927b03 | 1120 | if (gfs2_withdrawing_or_withdrawn(sdp)) |
5a61ae14 | 1121 | goto out_withdraw; |
16ca9412 | 1122 | lops_after_commit(sdp, tr); |
b09e593d | 1123 | |
fe1a698f | 1124 | gfs2_log_lock(sdp); |
faa31ce8 | 1125 | sdp->sd_log_blks_reserved = 0; |
b3b94faa | 1126 | |
d6a079e8 | 1127 | spin_lock(&sdp->sd_ail_lock); |
16ca9412 BM |
1128 | if (tr && !list_empty(&tr->tr_ail1_list)) { |
1129 | list_add(&tr->tr_list, &sdp->sd_ail1_list); | |
1130 | tr = NULL; | |
b3b94faa | 1131 | } |
d6a079e8 | 1132 | spin_unlock(&sdp->sd_ail_lock); |
b3b94faa | 1133 | gfs2_log_unlock(sdp); |
24972557 | 1134 | |
c1696fb8 | 1135 | if (!(flags & GFS2_LOG_HEAD_FLUSH_NORMAL)) { |
24972557 | 1136 | if (!sdp->sd_log_idle) { |
d5dc3d96 | 1137 | empty_ail1_list(sdp); |
4d927b03 | 1138 | if (gfs2_withdrawing_or_withdrawn(sdp)) |
5a61ae14 | 1139 | goto out_withdraw; |
c1696fb8 | 1140 | log_write_header(sdp, flags); |
24972557 | 1141 | } |
c1696fb8 BP |
1142 | if (flags & (GFS2_LOG_HEAD_FLUSH_SHUTDOWN | |
1143 | GFS2_LOG_HEAD_FLUSH_FREEZE)) | |
24972557 | 1144 | gfs2_log_shutdown(sdp); |
24972557 BM |
1145 | } |
1146 | ||
5a61ae14 | 1147 | out_end: |
fe3e3976 | 1148 | used_blocks = log_distance(sdp, sdp->sd_log_flush_head, first_log_head); |
2129b428 AG |
1149 | reserved_revokes += atomic_read(&sdp->sd_log_revokes_available); |
1150 | atomic_set(&sdp->sd_log_revokes_available, sdp->sd_ldptrs); | |
1151 | gfs2_assert_withdraw(sdp, reserved_revokes % sdp->sd_inptrs == sdp->sd_ldptrs); | |
1152 | if (reserved_revokes > sdp->sd_ldptrs) | |
1153 | reserved_blocks += (reserved_revokes - sdp->sd_ldptrs) / sdp->sd_inptrs; | |
5a61ae14 | 1154 | out: |
2129b428 AG |
1155 | if (used_blocks != reserved_blocks) { |
1156 | gfs2_assert_withdraw_delayed(sdp, used_blocks < reserved_blocks); | |
fe3e3976 | 1157 | gfs2_log_release(sdp, reserved_blocks - used_blocks); |
2129b428 | 1158 | } |
484adff8 | 1159 | up_write(&sdp->sd_log_flush_lock); |
b839dada | 1160 | gfs2_trans_free(sdp, tr); |
5a61ae14 AG |
1161 | if (gfs2_withdrawing(sdp)) |
1162 | gfs2_withdraw(sdp); | |
fe3e3976 | 1163 | trace_gfs2_log_flush(sdp, 0, flags); |
5a61ae14 AG |
1164 | return; |
1165 | ||
1166 | out_withdraw: | |
1167 | trans_drain(tr); | |
1168 | /** | |
1169 | * If the tr_list is empty, we're withdrawing during a log | |
1170 | * flush that targets a transaction, but the transaction was | |
1171 | * never queued onto any of the ail lists. Here we add it to | |
1172 | * ail1 just so that ail_drain() will find and free it. | |
1173 | */ | |
1174 | spin_lock(&sdp->sd_ail_lock); | |
1175 | if (tr && list_empty(&tr->tr_list)) | |
1176 | list_add(&tr->tr_list, &sdp->sd_ail1_list); | |
1177 | spin_unlock(&sdp->sd_ail_lock); | |
5a61ae14 AG |
1178 | tr = NULL; |
1179 | goto out_end; | |
b3b94faa DT |
1180 | } |
1181 | ||
d69a3c65 SW |
1182 | /** |
1183 | * gfs2_merge_trans - Merge a new transaction into a cached transaction | |
c551f66c | 1184 | * @sdp: the filesystem |
d69a3c65 SW |
1185 | * @new: New transaction to be merged |
1186 | */ | |
1187 | ||
83d060ca | 1188 | static void gfs2_merge_trans(struct gfs2_sbd *sdp, struct gfs2_trans *new) |
d69a3c65 | 1189 | { |
83d060ca BP |
1190 | struct gfs2_trans *old = sdp->sd_log_tr; |
1191 | ||
9862ca05 | 1192 | WARN_ON_ONCE(!test_bit(TR_ATTACHED, &old->tr_flags)); |
d69a3c65 SW |
1193 | |
1194 | old->tr_num_buf_new += new->tr_num_buf_new; | |
1195 | old->tr_num_databuf_new += new->tr_num_databuf_new; | |
1196 | old->tr_num_buf_rm += new->tr_num_buf_rm; | |
1197 | old->tr_num_databuf_rm += new->tr_num_databuf_rm; | |
2129b428 | 1198 | old->tr_revokes += new->tr_revokes; |
d69a3c65 | 1199 | old->tr_num_revoke += new->tr_num_revoke; |
d69a3c65 SW |
1200 | |
1201 | list_splice_tail_init(&new->tr_databuf, &old->tr_databuf); | |
1202 | list_splice_tail_init(&new->tr_buf, &old->tr_buf); | |
83d060ca BP |
1203 | |
1204 | spin_lock(&sdp->sd_ail_lock); | |
1205 | list_splice_tail_init(&new->tr_ail1_list, &old->tr_ail1_list); | |
1206 | list_splice_tail_init(&new->tr_ail2_list, &old->tr_ail2_list); | |
1207 | spin_unlock(&sdp->sd_ail_lock); | |
d69a3c65 SW |
1208 | } |
1209 | ||
b3b94faa DT |
1210 | static void log_refund(struct gfs2_sbd *sdp, struct gfs2_trans *tr) |
1211 | { | |
2332c443 | 1212 | unsigned int reserved; |
ac39aadd | 1213 | unsigned int unused; |
022ef4fe | 1214 | unsigned int maxres; |
b3b94faa DT |
1215 | |
1216 | gfs2_log_lock(sdp); | |
1217 | ||
022ef4fe | 1218 | if (sdp->sd_log_tr) { |
83d060ca | 1219 | gfs2_merge_trans(sdp, tr); |
022ef4fe | 1220 | } else if (tr->tr_num_buf_new || tr->tr_num_databuf_new) { |
c968f578 | 1221 | gfs2_assert_withdraw(sdp, !test_bit(TR_ONSTACK, &tr->tr_flags)); |
022ef4fe | 1222 | sdp->sd_log_tr = tr; |
9862ca05 | 1223 | set_bit(TR_ATTACHED, &tr->tr_flags); |
022ef4fe SW |
1224 | } |
1225 | ||
2332c443 | 1226 | reserved = calc_reserved(sdp); |
022ef4fe SW |
1227 | maxres = sdp->sd_log_blks_reserved + tr->tr_reserved; |
1228 | gfs2_assert_withdraw(sdp, maxres >= reserved); | |
1229 | unused = maxres - reserved; | |
5ae8fff8 AG |
1230 | if (unused) |
1231 | gfs2_log_release(sdp, unused); | |
b3b94faa DT |
1232 | sdp->sd_log_blks_reserved = reserved; |
1233 | ||
1234 | gfs2_log_unlock(sdp); | |
1235 | } | |
1236 | ||
db77789b AG |
1237 | static inline int gfs2_jrnl_flush_reqd(struct gfs2_sbd *sdp) |
1238 | { | |
1239 | return atomic_read(&sdp->sd_log_pinned) + | |
1240 | atomic_read(&sdp->sd_log_blks_needed) >= | |
1241 | atomic_read(&sdp->sd_log_thresh1); | |
1242 | } | |
1243 | ||
1244 | static inline int gfs2_ail_flush_reqd(struct gfs2_sbd *sdp) | |
1245 | { | |
1246 | return sdp->sd_jdesc->jd_blocks - | |
1247 | atomic_read(&sdp->sd_log_blks_free) + | |
1248 | atomic_read(&sdp->sd_log_blks_needed) >= | |
1249 | atomic_read(&sdp->sd_log_thresh2); | |
1250 | } | |
1251 | ||
b3b94faa DT |
1252 | /** |
1253 | * gfs2_log_commit - Commit a transaction to the log | |
1254 | * @sdp: the filesystem | |
1255 | * @tr: the transaction | |
1256 | * | |
5e687eac BM |
1257 | * We wake up gfs2_logd if the number of pinned blocks exceed thresh1 |
1258 | * or the total number of used blocks (pinned blocks plus AIL blocks) | |
1259 | * is greater than thresh2. | |
1260 | * | |
b57bc0fb | 1261 | * At mount time thresh1 is 2/5ths of journal size, thresh2 is 4/5ths of |
5e687eac BM |
1262 | * journal size. |
1263 | * | |
b3b94faa DT |
1264 | * Returns: errno |
1265 | */ | |
1266 | ||
1267 | void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr) | |
1268 | { | |
1269 | log_refund(sdp, tr); | |
b3b94faa | 1270 | |
db77789b | 1271 | if (gfs2_ail_flush_reqd(sdp) || gfs2_jrnl_flush_reqd(sdp)) |
5e687eac | 1272 | wake_up(&sdp->sd_logd_waitq); |
b3b94faa DT |
1273 | } |
1274 | ||
1275 | /** | |
1276 | * gfs2_log_shutdown - write a shutdown header into a journal | |
1277 | * @sdp: the filesystem | |
1278 | * | |
1279 | */ | |
1280 | ||
feed98a8 | 1281 | static void gfs2_log_shutdown(struct gfs2_sbd *sdp) |
b3b94faa | 1282 | { |
b3b94faa | 1283 | gfs2_assert_withdraw(sdp, !sdp->sd_log_blks_reserved); |
b3b94faa | 1284 | gfs2_assert_withdraw(sdp, !sdp->sd_log_num_revoke); |
b3b94faa DT |
1285 | gfs2_assert_withdraw(sdp, list_empty(&sdp->sd_ail1_list)); |
1286 | ||
805c0907 | 1287 | log_write_header(sdp, GFS2_LOG_HEAD_UNMOUNT | GFS2_LFC_SHUTDOWN); |
fe3e3976 | 1288 | log_pull_tail(sdp); |
b3b94faa | 1289 | |
a74604be SW |
1290 | gfs2_assert_warn(sdp, sdp->sd_log_head == sdp->sd_log_tail); |
1291 | gfs2_assert_warn(sdp, list_empty(&sdp->sd_ail2_list)); | |
a25311c8 SW |
1292 | } |
1293 | ||
ec69b188 SW |
1294 | /** |
1295 | * gfs2_logd - Update log tail as Active Items get flushed to in-place blocks | |
c551f66c | 1296 | * @data: Pointer to GFS2 superblock |
ec69b188 SW |
1297 | * |
1298 | * Also, periodically check to make sure that we're using the most recent | |
1299 | * journal index. | |
1300 | */ | |
1301 | ||
1302 | int gfs2_logd(void *data) | |
1303 | { | |
1304 | struct gfs2_sbd *sdp = data; | |
5e687eac | 1305 | unsigned long t = 1; |
ec69b188 | 1306 | |
76e7211c | 1307 | set_freezable(); |
ec69b188 | 1308 | while (!kthread_should_stop()) { |
4d927b03 | 1309 | if (gfs2_withdrawing_or_withdrawn(sdp)) |
fe0690f0 | 1310 | break; |
ec69b188 | 1311 | |
942b0cdd BP |
1312 | /* Check for errors writing to the journal */ |
1313 | if (sdp->sd_log_error) { | |
badb55ec AG |
1314 | gfs2_lm(sdp, |
1315 | "GFS2: fsid=%s: error %d: " | |
1316 | "withdrawing the file system to " | |
1317 | "prevent further damage.\n", | |
1318 | sdp->sd_fsname, sdp->sd_log_error); | |
1319 | gfs2_withdraw(sdp); | |
fe0690f0 | 1320 | break; |
942b0cdd BP |
1321 | } |
1322 | ||
5e687eac | 1323 | if (gfs2_jrnl_flush_reqd(sdp) || t == 0) { |
5e4c7632 | 1324 | gfs2_ail1_empty(sdp, 0); |
805c0907 | 1325 | gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL | |
fe3e3976 | 1326 | GFS2_LFC_LOGD_JFLUSH_REQD); |
5e687eac | 1327 | } |
ec69b188 | 1328 | |
b74cd55a AG |
1329 | if (test_bit(SDF_FORCE_AIL_FLUSH, &sdp->sd_flags) || |
1330 | gfs2_ail_flush_reqd(sdp)) { | |
1331 | clear_bit(SDF_FORCE_AIL_FLUSH, &sdp->sd_flags); | |
5e687eac | 1332 | gfs2_ail1_start(sdp); |
26b06a69 | 1333 | gfs2_ail1_wait(sdp); |
5e4c7632 | 1334 | gfs2_ail1_empty(sdp, 0); |
805c0907 | 1335 | gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL | |
fe3e3976 | 1336 | GFS2_LFC_LOGD_AIL_FLUSH_REQD); |
ec69b188 SW |
1337 | } |
1338 | ||
ec69b188 | 1339 | t = gfs2_tune_get(sdp, gt_logd_secs) * HZ; |
a0acae0e | 1340 | |
edd13270 | 1341 | t = wait_event_freezable_timeout(sdp->sd_logd_waitq, |
b74cd55a | 1342 | test_bit(SDF_FORCE_AIL_FLUSH, &sdp->sd_flags) || |
6df373b0 AG |
1343 | gfs2_ail_flush_reqd(sdp) || |
1344 | gfs2_jrnl_flush_reqd(sdp) || | |
b6b8f72a | 1345 | sdp->sd_log_error || |
4d927b03 | 1346 | gfs2_withdrawing_or_withdrawn(sdp) || |
6df373b0 AG |
1347 | kthread_should_stop(), |
1348 | t); | |
ec69b188 SW |
1349 | } |
1350 | ||
e0f1f021 AG |
1351 | if (gfs2_withdrawing(sdp)) |
1352 | gfs2_withdraw(sdp); | |
1353 | ||
ec69b188 SW |
1354 | return 0; |
1355 | } | |
1356 |